Danfoss AKD 2800 Quick Setup Manual page 25

104 Motor frequency, f ). It is assumed that the
M,N
output current will not reach the current limit (set
in parameter 221 Current limit I
Description of choice:
Set the required ramp-up time.
208 Ramp-down time 1
(RAMP DOWN TIME 1)
Value:
0.02 - 3600.00 sec
Function:
The ramp-down time is the deceleration time
from the rated motor frequency f
104 Motor frequency, f
M,N
no overvoltage arises in the inverter because of
generating operation of the motor.
Description of choice:
Set the required ramp-down time.
214 Reference function
(REF FUNCTION)
Value:
Sum ( SUM)
Relative ( RELATIVE)
External/preset (EXTERNAL/PRESET)
Function:
It is possible to define how preset references are to
be added to the other references; for this purpose,
use Sum or Relative. It is also possible by using the
External/preset to select whether a shift between
external references and preset references is required.
External reference is the sum of the analogue
references, pulse references and any references
from serial communication.
Description of choice:
If Sum [0] is selected, one of the adjusted
preset references (parameters 215-218 Preset
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.H2.02 -
).
LIM
1.00 sec
(parameter
M,N
) to 0 Hz, provided
[0]
[1]
[2]
AKD 2800
reference) is summarized as a percentage of
the reference range (Ref
MIN
the other external references.
If Relative [1] is selected, one of the added preset
references (parameters 215-218 Preset reference)
is summarized as a percentage of the sum of
present external references.
If External/preset [2] is selected, it is possible via
a digital input to shift between external references
or preset references. Preset references will be a
percentage value of the reference range.
NB!:
If Sum or Relative is selected, one of the
preset references will always be active. If the
preset references are to be without influence,
they must be set to 0% (factory setting).
215 Preset reference 1 (PRESET REF. 1)
216 Preset reference 2 (PRESET REF. 2)
217 Preset reference 3 (PRESET REF. 3)
218 Preset reference 4 (PRESET REF. 4)
Value:
-100.00% - +100.00%
of the reference range/external reference
Function:
Four different preset references can be programmed
in parameters 215-218 Preset reference.
The preset reference is stated as a percentage of the
reference range (Ref - Ref
MIN
of the other external references, depending on the
choice made in parameter 214 Reference function.
The choice between preset references can be made
via the digital inputs or via serial communication.
Preset ref., msb Preset ref. lsb
0
0
1
1
Description of choice:
Set the preset reference(s) that is/are to be the options.
- Ref ), added to
MAX
0.00%
) or as a percentage
MAX
0 Preset ref. 1
1 Preset ref. 2
0 Preset ref. 3
1 Preset ref. 4
25